Now you are no longer limited to only charging in the front seat during road trips. Designed with a 6-foot cable, the Road RockStar allows backseat passengers to fully charge their devices at the same time. Charge up to four devices combining smartphones and tablets as they optimally charge at up to 2.4 Amps. The back two USB ports can even charge two 2.4-Amp tablets at the same time for those long trips when watching movies.